<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <!-- 数据源roleslist -->
      <el-table :data="roleslist">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bd-bottom', i1 == 0 ? 'bd-top' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)"> {{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级 三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 == 0 ? '' : 'bd-top', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级 -->
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="danger" closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>
              {{ scope.row }}
           </pre
            > -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="序号"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="small" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="small" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="small" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框  close监听窗口关闭事件-->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
      <!-- 内容主题区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClose">
      <!-- 内容主题区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClose">
      <!-- 树形控件 rightslist数据源-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleslist: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      //添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      //添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 1, max: 10, message: '角色名的长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 1, max: 15, message: '角色描述的长度在 1 到 15 个字符', trigger: 'blur' }
        ]
      },
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的角色信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        // 角色名称和角色描述不需要验证规则
      },
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限数据 默认为空
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        //看到的哪个属性对应的值
        label: 'authName',
        //父子节点通过哪个属性进行嵌套
        children: 'children'
      },
      //默认选中的节点Id值数组
      defKeys: [],
      //当前即将分配权限的角色Id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取所有角色列表失败！')
      }
      this.roleslist = res.data
      console.log(this.roleslist)
    },
    //监听角色对话框的关闭事件
    addDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮添加新角色
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        //可以添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色信息失败！')
        }
        this.$message.success('添加角色信息成功!')
        //隐藏添加角色的对话框
        this.addDialogVisible = false
        // 重新获取角色列表数据
        this.getRolesList()
      })
    },
    //展示编辑角色的对话框
    async showEditDialog(id) {
      console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    //监听修改角色对话框关闭之后重置
    editDialogClose() {
      this.$refs.editFormRef.resetFields()
    },
    //修改角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        //发起修改角色信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getRolesList()
        //  提示修改成功
        this.$message.success('修改角色信息成功!')
      })
    },
    //根据id删除对应的角色信息
    async removeRoleById(id) {
      // console.log(id)
      //弹窗询问角色是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      //如果用户确认删除，则返回值为字符串 confir
      //如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult == 'cancel') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功!')
      //刷新数据列表
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除，则返回值为字符串 confir
      //如果用户取消删除，则返回值为字符串 cancel
      if (confirmResult == 'cancel') {
        return this.$message.info('取消了删除')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}
`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      this.$message.success('删除权限成功!')
      //重新赋值权限
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      //把获取到的权限数据保存到 data中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取三级节点的Id
      this.getLeafkeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    //通过递归的形式,获取角色下所有三级权限的id,并保存到  defKeys数组中
    getLeafkeys(node, arr) {
      //如果当前node节点不包含 children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      //没有return 不是三级节点 进一步调用递归
      node.children.forEach(item => this.getLeafkeys(item, arr))
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClose() {
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        //获取全选
        ...this.$refs.treeRef.getCheckedKeys(),
        //获取半选
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bd-top {
  border-top: 1px solid #eee;
}
.bd-bottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
